Initial commit: InTono — app KMP per l'apprendimento musicale

App Kotlin Multiplatform (Android/iOS/Desktop) con Compose Multiplatform:
controllo intonazione (YIN), pratica guidata, metronomo, ear training,
sfide, scansione spartiti via AI, spartiti bundled e pentagramma con
glifi tipografici, travature, battute e spaziatura proporzionale.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

video/.agents/skills/remotion-best-practices/rules/transparent-videos.md

@@ -0,0 +1,106 @@
+---
+name: transparent-videos
+description: Rendering transparent videos in Remotion
+metadata:
+  tags: transparent, alpha, codec, vp9, prores, webm
+---
+
+# Rendering Transparent Videos
+
+Remotion can render transparent videos in two ways: as a ProRes video or as a WebM video.
+
+## Transparent ProRes
+
+Ideal for when importing into video editing software.
+
+**CLI:**
+
+```bash
+npx remotion render --image-format=png --pixel-format=yuva444p10le --codec=prores --prores-profile=4444 MyComp out.mov
+```
+
+**Default in Studio** (restart Studio after changing):
+
+```ts
+// remotion.config.ts
+import { Config } from "@remotion/cli/config";
+
+Config.setVideoImageFormat("png");
+Config.setPixelFormat("yuva444p10le");
+Config.setCodec("prores");
+Config.setProResProfile("4444");
+```
+
+**Setting it as the default export settings for a composition** (using `calculateMetadata`):
+
+```tsx
+import { CalculateMetadataFunction } from "remotion";
+
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({
+  props,
+}) => {
+  return {
+    defaultCodec: "prores",
+    defaultVideoImageFormat: "png",
+    defaultPixelFormat: "yuva444p10le",
+    defaultProResProfile: "4444",
+  };
+};
+
+<Composition
+  id="my-video"
+  component={MyVideo}
+  durationInFrames={150}
+  fps={30}
+  width={1920}
+  height={1080}
+  calculateMetadata={calculateMetadata}
+/>;
+```
+
+## Transparent WebM (VP9)
+
+Ideal for when playing in a browser.
+
+**CLI:**
+
+```bash
+npx remotion render --image-format=png --pixel-format=yuva420p --codec=vp9 MyComp out.webm
+```
+
+**Default in Studio** (restart Studio after changing):
+
+```ts
+// remotion.config.ts
+import { Config } from "@remotion/cli/config";
+
+Config.setVideoImageFormat("png");
+Config.setPixelFormat("yuva420p");
+Config.setCodec("vp9");
+```
+
+**Setting it as the default export settings for a composition** (using `calculateMetadata`):
+
+```tsx
+import { CalculateMetadataFunction } from "remotion";
+
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({
+  props,
+}) => {
+  return {
+    defaultCodec: "vp8",
+    defaultVideoImageFormat: "png",
+    defaultPixelFormat: "yuva420p",
+  };
+};
+
+<Composition
+  id="my-video"
+  component={MyVideo}
+  durationInFrames={150}
+  fps={30}
+  width={1920}
+  height={1080}
+  calculateMetadata={calculateMetadata}
+/>;
+```